Decodes Base64 into bytes. Encodes arbitrary bytes as Base64. Decrypts Base64 AES-256-CBC ciphertext into raw plaintext. Encrypts raw plaintext using AES-256-CBC and returns Base64 ciphertext plus Base64 IV. Generates secure random bytes and returns them Base64-encoded. Generates a Base64-encoded 32-byte key. Returns a hexadecimal digest. Computes HMAC-SHA256 and returns a Base64 digest. Returns raw secure random bytes. Hashes a Luau function's prototype-derived representation using SHA384. Compresses bytes into a raw LZ4 block. Decompresses bytes produced by Byte's LZ4 compressor.